Demography of alligator pipefish, Syngnatboides biaculeatus and its relationship to seagrass habitat at Kampung Kibagu, Kota Kinabalu, Sabah

Cheah, Jiun Xiang (2012) Demography of alligator pipefish, Syngnatboides biaculeatus and its relationship to seagrass habitat at Kampung Kibagu, Kota Kinabalu, Sabah. Universiti Malaysia Sabah. (Unpublished)

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Abstract

A study was conducted to study the relationship between the abundance of alligator pipefish, Sygnathoides biaculeatus and seagrass area, its population size and demographical aspects (size, weight, sex ratio, fecundity) in Kampung Kibagu, Kota Kinabalu, Sabah. The study was conducted monthly from August 2011 to April 2012. The population estimation of pipefish was estimated 324 Individuals using Petersen method and 648 Individuals using Schnabel method. Low recapture of tagged specimens suggest lack of site specificity In pipefish. The total pipefish caught was 55 specimens, with a 1:1 male-female sex ratio. The average catch per unit effort was 1.7/100 m². Gravid males were only 11.11% of the caught specimens carrying an average 71 ± 9.06 eggs. The length of male pipefish ranges 13.5 cm to 23 cm while the length of female pipefish ranges 13 cm to 21 cm. The average length of male and female were 19.20 cm and 18.06 cm, respectively. The average weight of male and female were 8.01 g and 6.25 g, respectively. There was no significance difference between length of male and female (t(₂, ₄₉)= -1.209, p=0.2325; (p>0.05». The weight of male pipefish ranges 3.26 g to 12.35 g; the female ranges 1.58 g to 10.78 g. It was found that there was significant difference between weight of male and female (t(₂, ₄₉)= -2.532, p=0.0146; (p>0.05». Females have stronger weight-length relationship (r² =0.8192) versus males (r² =0.555). The trend of seagrass coverage was generally fluctuating. The average length seagrass blade ranges 38.67 cm to 54.54 cm of five study sites. ANOVA test showed significant difference In seagrass coverage between sites F(₄, ₃₀)= 15.895, p= 0.000; (p>0.05) where site 5 is significantly different compared to other 4 sites. It was found that there were no significant differences in seagrass coverage between months (F(₇,₂₆)= 1.918, p= 0.107; (p>0.05», length of seagrass blade between sites (F(₄,₂₁₅)= 0.40, p= 0.805; (p>0.05» and length of seagrass blade between months (F(₃,₁₆)= 1.010, p= 0.414; (p>0.05». The relationship of both pipefish number-seagrass coverage and pipefish number-length of seagrass blade were weak, with r² value of 0.108 and 0.298 respectively.

Item Type:Academic Exercise
Uncontrolled Keywords:alligator pipefish, Sygnathoides biaculeatus, seagrass, population size, demography, Schnabel method
Subjects:Q Science > QH Natural history > QH301 Biology
Divisions:SCHOOL > School of Science and Technology
ID Code:13454
Deposited By:IR Admin
Deposited On:20 Jun 2016 13:38
Last Modified:20 Jun 2016 13:38

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